linux-kernel - [PATCH v2 6/6] staging: iio: ad9832: add sysfs documentation

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Message-ID: <20251230203459.28935-7-tomasborquez13@gmail.com>
Date: Tue, 30 Dec 2025 17:34:59 -0300
From: Tomas Borquez <tomasborquez13@...il.com>
To: Jonathan Cameron <jic23@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Michael Hennerich <Michael.Hennerich@...log.com>
Cc: David Lechner <dlechner@...libre.com>,
	Nuno Sá <nuno.sa@...log.com>,
	Andy Shevchenko <andy@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-iio@...r.kernel.org,
	linux-staging@...ts.linux.dev,
	Tomas Borquez <tomasborquez13@...il.com>
Subject: [PATCH v2 6/6] staging: iio: ad9832: add sysfs documentation

Add sysfs ABI documentation for the AD9832/AD9835 Direct Digital
Synthesizer chips, documenting frequency, phase, output control,
and pin control attributes.

Signed-off-by: Tomas Borquez <tomasborquez13@...il.com>
---
 .../iio/Documentation/sysfs-bus-iio-frequency | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 drivers/staging/iio/Documentation/sysfs-bus-iio-frequency

diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-frequency b/drivers/staging/iio/Documentation/sysfs-bus-iio-frequency
new file mode 100644
index 000000000000..10627c19bdb7
--- /dev/null
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-frequency
@@ -0,0 +1,40 @@
+What:		/sys/bus/iio/devices/iio:deviceX/out_altcurrentY_frequencyZ
+KernelVersion:	6.19
+Contact:	linux-iio@...r.kernel.org
+Description:
+    Frequency in Hz for symbol Z of channel Y. The active
+    frequency symbol is selected via out_altcurrentY_frequency_symbol.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_altcurrentY_phaseZ
+KernelVersion:	6.19
+Contact:	linux-iio@...r.kernel.org
+Description:
+    Phase offset in radians for symbol Z of channel Y. Valid range
+    is 0 to 2*PI (exclusive). The active phase symbol is selected
+    via out_altcurrentY_phase_symbol.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_altcurrentY_frequency_symbol
+KernelVersion:	6.19
+Contact:	linux-iio@...r.kernel.org
+Description:
+    Selects which frequency symbol is active for channel Y.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_altcurrentY_phase_symbol
+KernelVersion:	6.19
+Contact:	linux-iio@...r.kernel.org
+Description:
+    Selects which phase symbol is active for channel Y.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_altcurrentY_enable
+KernelVersion:	6.19
+Contact:	linux-iio@...r.kernel.org
+Description:
+    Enables (1) or disables (0) the output for channel Y.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_altcurrentY_pincontrol_en
+KernelVersion:	6.19
+Contact:	linux-iio@...r.kernel.org
+Description:
+    Enables (1) or disables (0) hardware pin control for frequency
+    and phase symbol selection on channel Y. When enabled, external
+    pins control symbol selection instead of software.
-- 
2.43.0